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[Python-Dev] PEP 342: simple example, closure alternative

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> A closure based accumulator (using Scheme):>> (define (accum n)>   (lambda (incr)>    (set! n (+ n incr))>    n))> (define s (accum 0))> (s 1) ; -> 1 == 0+1> (s 5) ; -> 6 == 1+5>> So I thought the generator version might look like:>> def accum(n):>      while 1:>          incr = (yield n) or 0>          n += incrMaybe I'm missing something but this example seems needlessly tricky to me.How about doing it this way?def accum(n):acc = [n]def f(incr):acc[0] += incrreturn acc[0]return fHere, the [0] turns "read-only" access into write access to a list element.The list itself isn't written; only its element is.

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